11462 enable smatch by default

*** 11,28 ****
  # Copyright (c) 2019, Joyent, Inc.
  #
  
  #
  # The src/ sub-directory is un-modified copy of
! # https://github.com/illumos/smatch/tree/0.5.1-il-1
  #
  # This Makefile installs just enough for us to be able to run smatch
  # locally.
  #
  
  PROG = smatch
! SPARSE_VERSION = 0.5.1-il-1
  
  include ../Makefile.tools
  
  # We have to build smatch before we can use cw
  i386_CC = $(GNUC_ROOT)/bin/gcc
--- 11,28 ----
  # Copyright (c) 2019, Joyent, Inc.
  #
  
  #
  # The src/ sub-directory is un-modified copy of
! # https://github.com/illumos/smatch/tree/0.5.1-il-3
  #
  # This Makefile installs just enough for us to be able to run smatch
  # locally.
  #
  
  PROG = smatch
! SPARSE_VERSION = 0.5.1-il-3
  
  include ../Makefile.tools
  
  # We have to build smatch before we can use cw
  i386_CC = $(GNUC_ROOT)/bin/gcc